[3.13] gh-146333: Fix quadratic regex backtracking in configparser option parsing (GH-146399)#148559
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encukou merged 1 commit intopython:3.13from Apr 15, 2026
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…ser option parsing (pythonGH-146399) Use negative lookahead in option regex to prevent backtracking, and to avoid changing logic outside the regexes (since people could use the regex directly). (cherry picked from commit 7e0a0be) Co-authored-by: Joshua Swanson <22283299+joshuaswanson@users.noreply.github.com>
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Thanks @encukou for the PR 🌮🎉.. I'm working now to backport this PR to: 3.10, 3.11, 3.12. |
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Sorry, @encukou, I could not cleanly backport this to |
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Sorry, @encukou, I could not cleanly backport this to |
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Sorry, @encukou, I could not cleanly backport this to |
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Use negative lookahead in option regex to prevent backtracking, and to avoid changing logic outside the regexes (since people could use the regex directly).
(cherry picked from commit 7e0a0be)
configparser.RawConfigParser.{OPTCRE,OPTCRE_NV}regexes vulnerable to quadratic backtracking #146333